Can't remember the first time I played, but I know as a little kid I would start new games on my brother's but never save. I also don't remember what I did when I finally got a red version of my own. The only two members I'm pretty sure I had were a Charizard and a Parasect, no idea what else.
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I know that when I first beat the Elite 4, I had a Lv. 100 Blaziken, a Kyogre at a high enough level to know Sheer Cold, a Castform that was not yet Lv. 50 (It knew Surf and Waterfall) and an enormous PokÚdex. I don't know anything else; I was young when I first beat Sapphire.